80 lines
2.0 KiB
MySQL
80 lines
2.0 KiB
MySQL
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-- Nicolás A. Ortega Froysa
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-- ASIR 1
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-- GBD
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CREATE TABLE fabricantes(
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codigo INT PRIMARY KEY,
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nombre VARCHAR(100)
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);
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CREATE TABLE articulos(
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codigo INT PRIMARY KEY,
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nombre VARCHAR(100),
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precio INT,
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fabricante INT,
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FOREIGN KEY (fabricante) REFERENCES fabricantes(codigo)
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);
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INSERT INTO fabricantes VALUES(1, 'LG');
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INSERT INTO fabricantes VALUES(2, 'SAMSUNG');
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INSERT INTO fabricantes VALUES(3, 'SIEMENS');
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INSERT INTO fabricantes VALUES(4, 'SONY');
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INSERT INTO articulos VALUES(1, "RADIO", 180, 1);
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INSERT INTO articulos VALUES(2, "RADIO", 100, 2);
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INSERT INTO articulos VALUES(3, "RADIO", 70, 3);
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INSERT INTO articulos VALUES(4, "RADIO", 50, 4);
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INSERT INTO articulos VALUES(5, "TELEVISION", 320, 1);
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INSERT INTO articulos VALUES(6, "TELEVISION", 850, 2);
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INSERT INTO articulos VALUES(7, "TELEVISION", 600, 3);
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INSERT INTO articulos VALUES(8, "TELEVISION", 170, 4);
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-- 1.1
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SELECT DISTINCT nombre FROM articulos;
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-- 1.2
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SELECT nombre, precio FROM articulos;
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-- 1.3
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SELECT nombre FROM articulos WHERE precio <= 200;
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-- 1.4
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SELECT * FROM articulos WHERE precio >= 60 AND precio <= 120;
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SELECT * FROM articulos WHERE precio BETWEEN 60 AND 120;
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-- 1.5
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SELECT nombre, precio * 166386 "Precio Pesetas" FROM articulos;
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-- 1.6
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SELECT AVG(precio) FROM articulos;
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-- 1.7
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SELECT AVG(precio) FROM articulos WHERE fabricante=2;
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-- 1.8
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SELECT COUNT(*) FROM articulos WHERE precio >= 180;
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-- 1.9
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SELECT nombre, precio FROM articulos WHERE precio >= 180 ORDER BY precio DESC, nombre ASC;
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-- 1.10
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SELECT * FROM articulos a JOIN fabricantes f ON a.fabricante=f.codigo;
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-- 1.11
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SELECT a.nombre, a.precio, f.nombre FROM articulos a JOIN fabricantes f ON a.fabricante=f.codigo;
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-- 1.12
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SELECT nombre, precio FROM articulos ORDER BY precio ASC LIMIT 1;
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-- 1.13
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INSERT INTO articulos VALUES(9, 'ALTAVOCES', 70, 2);
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-- 1.14
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UPDATE articulos SET nombre='IMPRESORA LASER' WHERE codigo=8;
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-- 1.15
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UPDATE articulos SET precio=precio*0.9;
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-- 1.16
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UPDATE articulos SET precio=precio-10 WHERE precio >= 120;
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